WO2013127136A1 - Procédé et dispositif de commutation de service téléphonique - Google Patents

Procédé et dispositif de commutation de service téléphonique Download PDF

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Publication number
WO2013127136A1
WO2013127136A1 PCT/CN2012/076447 CN2012076447W WO2013127136A1 WO 2013127136 A1 WO2013127136 A1 WO 2013127136A1 CN 2012076447 W CN2012076447 W CN 2012076447W WO 2013127136 A1 WO2013127136 A1 WO 2013127136A1
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Prior art keywords
network
voice service
information
parameter information
message
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PCT/CN2012/076447
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English (en)
Chinese (zh)
Inventor
徐斌
Original Assignee
中兴通讯股份有限公司
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Publication of WO2013127136A1 publication Critical patent/WO2013127136A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for switching voice services.
  • a voice service uses a circuit switched system (Circuit)
  • the Switch (referred to as CS) for transmission, and the Voice over Internet Protocol (VoIP) based on the Internet Protocol (IP) can be transmitted by using a Packet Switch (PS).
  • PS Packet Switch
  • EPS Evolved Packet System
  • the communication network is evolving from the circuit-switched network to the all-IP network.
  • EPS Evolved Packet System
  • the network coverage will be incomplete, and users will appear at this time.
  • Terminal Equipment User Equipment
  • UE User Equipment
  • the voice service needs to be switched between the EPS system or the 3G network and the 2G circuit domain.
  • a method for switching a voice service including: receiving, by a UE, a handover message sent by a first network, where the first network is a network that supports a PS domain voice service, and the handover message carries The parameter information of the second network to which the voice service is to be switched, the second network is a network that supports the CS domain voice service; the UE performs resource configuration according to the parameter information of the second network, and switches the voice service to the second network.
  • the first network includes one of the following: a TD network, an LTE network, and an EPS network; the foregoing second network includes one of the following: a TD network, a GSM network.
  • the receiving, by the UE, the handover message sent by the first network includes: receiving, by the UE, a resource block RB setup message sent by the TD network: the UE according to the parameter information of the second network And performing the resource configuration, and switching the voice service to the second network, the method includes: the UE saves the parameter information of the second network, and configures the bottom layer resource of the UE according to the saved parameter information, and switches the voice service to the second network.
  • the method further includes: deleting, by the UE, parameter information of the first network.
  • the method further includes: the access layer of the UE sends an SRVCC start message to the non-access stratum of the UE, and the non-access stratum of the UE calculates the authentication parameter;
  • the method further includes: the access layer of the UE sends an SRVCC end message to the non-access stratum of the UE, and the non-access stratum of the UE notifies the session management/senior session management SM /ESM releases the PS voice bearer, establishes a mobility management connection, and notifies the CC module to establish a voice entity.
  • the UE receives the handover message sent by the first network, and includes: the access layer of the LTE network in the UE receives the handover message of the LTE network, and sends the handover message to the UE.
  • the access layer of the second network forwards the handover message; the UE performs resource configuration according to the parameter information of the second network, and switches the voice service to the second network, including: the access layer of the second network in the UE saves the second network.
  • the parameter information is configured, and the bottom layer resource of the UE is configured according to the saved parameter information of the second network, and the voice service is switched to the second network.
  • the method further includes: the access layer of the LTE in the UE sends an SRVCC start message to the non-access stratum of the UE, and the UE does not access the UE.
  • the layer calculates the authentication parameter.
  • the method further includes: the UE sending a handover complete message to the LTE network, and sending an SRVCC end message to the non-access stratum of the UE, where The UE non-access stratum notifies the SM/ESM to release the PS voice bearer, establishes a mobility management connection, and notifies the CC module to establish a voice entity.
  • the UE receives the handover message sent by the first network, and includes: the access layer of the TD network in the UE receives the handover message of the TD network, and sends the handover message to the UE.
  • the access layer of the GSM network sends a handover message; the UE performs resource configuration according to the parameter information of the second network, and switches the voice service to the second network, including: the UE performs GSM underlay synchronization, and switches the voice service to the GSM network.
  • the method further includes: the access layer of the TD network in the UE sends an SRVCC start message to the non-access stratum, and is calculated by the non-access stratum of the UE.
  • the authentication parameter, the access layer of the TD network in the UE sends a determination of the handover type in the cell search and reselection (CSR) module handover message; after the voice service is switched to the GSM network, the method further includes: the GSM access of the UE
  • the layer informs the UE that the TD access layer GSM bottom layer synchronization is completed, the TD network in the UE releases the resource, and sends an SRVCC end message to the non-access stratum of the UE, and the non-access stratum of the UE notifies the SM/ESM to release the PS voice bearer, and establishes mobility.
  • the parameter information of the foregoing second network includes at least one of the following: a new radio access bearer RAB information list (RablnfoList) information to be established, each specific RAB information in the RablnfoLis, and a domain letter.
  • a switching apparatus for a voice service including: a receiving module, configured to receive a handover message sent by a first network, where the first network is a network of a PS domain voice service, and the handover is performed.
  • the message carries the parameter information of the second network to which the voice service is to be switched, and the second network is the network that supports the voice service of the CS domain.
  • the switching module is configured to perform resource configuration according to the parameter information of the second network, and switch the voice service to Second network.
  • the receiving module is further configured to: when the first network and the second network are both TD networks, receive a resource block RB establishment message sent by the TD network; and the switching module includes: a first saving unit, setting Preserving the parameter information of the second network in the access layer of the first network of the UE; the first matching handover element is configured to configure the bottom layer resource of the UE according to the saved parameter information in the access layer of the first network of the UE, and set the voice The service switches to the second network.
  • the foregoing switching module further includes: a deleting unit, configured to delete parameter information of the first network.
  • the receiving module includes: a receiving unit, configured to receive a handover message of the LTE network when the first network is an LTE network, and the second network is a TD network; and the sending unit is configured to be in the second network of the UE
  • the access layer forwards the handover message
  • the switching module includes: a second saving unit, configured to save parameter information of the second network in an access layer of the second network in the UE; and a second switching unit, configured to be in the second network in the UE
  • the access layer configures the underlying resources of the UE according to the saved parameter information of the second network, and switches the voice service to the second network.
  • the parameter information of the foregoing second network includes at least one of the following: a new radio access bearer RAB information list (RablnfoList) information to be established, each RAB information specific in RablnfoLis, domain information, and RB information, The replaced RAB's identity (RabReplaceld) information, the target network's SRVCC encrypted Nonce information.
  • the UE receives the handover message of the first network (the network supporting the voice service of the PS domain), and performs resource configuration according to the parameter information of the second network (the network supporting the voice service of the CS domain) carried in the handover message.
  • the voice service of the UE is switched to the second network, and the voice service is switched from the PS domain to the CS domain, and the unified processing of the TD network and the GSM network non-access layer in the UE is implemented.
  • FIG. 2 is a flowchart of a method for switching a voice service according to a first embodiment of the present invention
  • FIG. 3 is a flowchart according to an embodiment of the present invention.
  • 2 is a flowchart of a method for switching a voice service
  • FIG. 4 is a flowchart of a method for switching a voice service according to a third embodiment of the present invention
  • FIG. 5 is a diagram of determining a handover type of a TD network to a GSM network according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a process of a non-access stratum SRVCC of a UE according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a flow of a method for switching a voice service according to an embodiment of the present invention
  • FIG. 9 is a structural block diagram of a switching apparatus for a voice service in a TD network according to an embodiment of the present invention
  • FIG. 10 is a structural diagram of a preferred configuration module according to an embodiment of the present invention
  • FIG. 11 is a structural block diagram of a device for switching a voice service of an LTE network to a TD network according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for switching a voice service according to an embodiment of the present invention.
  • the method may include the following steps (step S102-step S104):
  • the second network is a network that supports circuit switched (CS) domain voice services.
  • Step S104 The UE performs resource configuration according to the parameter information of the second network, and switches the voice service to the second network.
  • the UE receives the handover message of the first network (the network supporting the voice service of the PS domain), and performs resource configuration according to the parameter information of the second network (the network supporting the voice service of the CS domain) carried in the handover message.
  • the voice service of the UE is switched to the second network, and the voice service is switched from the PS domain to the CS domain.
  • the UE is currently performed by a network that supports the PS domain voice service (for example, a Time Division (TD) network, a Long Term Evolution (LTE) network, and an EPS network).
  • TD Time Division
  • LTE Long Term Evolution
  • the voice service can be switched to a network that supports the CS domain voice service (for example, a TD network, a Global System for Mobile Communication (GSM) network, etc.).
  • the UE performs the PS domain-based voice service through the LTE network.
  • the UE may Switching from the LTE network to the GSM network, since the GSM is a network supporting the voice service of the CS domain, the UE switches the voice service of the PS domain of the LTE network to the CS domain of the GSM network.
  • the UE may perform voice service switching within the same network.
  • the UE performs a PS domain-based voice service in the TD network, and the UE moves to an area that only supports the CS domain voice service.
  • the medium PS domain voice service is switched to the CS domain in the TD network.
  • the UE can also perform voice service switching between different networks. For example, the UE performs the PS domain voice service through the EPS network, detects that the EPS network signal quality is degraded, and the current TD network (supports the CS domain voice service) signal quality. Higher, the UE can switch voice services from the EPS network to the TD network.
  • the UE configures the bottom layer resource of the UE according to the parameter information of the second network when performing the voice service switching.
  • the parameter information of the first network and the second network may be a new one to be established.
  • Radio Access Bear (RAB) information list (RablnfoList) information each RAB information, domain information and resource block (Resource Block, RB for short) information in RablnfoLis, the identity of the replaced Rab (RabReplaceld) information, Single Radio Voice Call Continuity (SRVCC for short)
  • RAB Radio Access Bear
  • the UE is performing voice service through the PS domain of the LTE network.
  • the neighboring cell of the cell has a cell with a better signal of the TD network.
  • the LTE network can notify the UE to switch to the cell of the TD network, and the TD cell only supports the CS domain voice call, and the UE needs to switch between the PS domain phone and the CS domain phone. Therefore, the LTE network sends a handover message to the UE, where the handover message carries the CS domain RAB information, the domain information, and the RB information that is required to be established.
  • the access layer of the UE After receiving the handover message, the access layer of the UE saves the above information and sends an SRVCC procedure start message to the UE non-access stratum. Then, the access layer of the UE performs handover, and the underlying resource is configured. After the access layer handover completes sending the handover complete message to the LTE network, the access layer of the UE sends an SRVCC end message to the non-access stratum of the UE.
  • the voice service is switched from the PS domain of the TD network to the CS domain of the TD network, the PS domain of the LTE network to the CS domain of the TD network, and the PS domain of the TD network.
  • the UE when the first network and the second network are both TD networks, when the UE performs voice service switching, the UE receives the resource block RB establishment message sent by the TD network, and saves the parameter information of the second network (TD network).
  • the underlying resources of the UE are configured according to the saved parameter information, and the voice service is switched to the second network.
  • the UE may also delete parameter information of the first network.
  • the UE can also perform a single channel voice continuity (SRVCC) process. Specifically, after the UE saves the parameter information of the second network, the access layer of the UE sends an SRVCC start message to the non-access stratum of the UE, and the non-access stratum mobile performance management module of the UE
  • SRVCC single channel voice continuity
  • the access layer of the UE After the UE configures the underlying resource according to the saved parameter information of the second network, the access layer of the UE sends an SRVCC end message to the non-access stratum of the UE. For example, the UE camps on a cell of a TD network that supports only the PS domain voice service. When the TD network signal of the cell is weak, the TD network sends an RB setup message to the UE, and the decision is made to switch the voice service of the UE to another. A cell of a TD that only supports voice services in the CS domain.
  • the UE receives the handover message sent by the TD network (ie, the first network) that supports the PS domain voice service, and the handover message carries the RAB information and the RB information. After receiving the handover message, the UE saves the received RAB information and the RB information in a new resource table, and saves the RAB information that needs to be deleted in the deletion list according to the RAB replacement (RABreplace) information.
  • the UE's access layer sends an SRVCC Start (SRVCC_Ind) message to the non-access stratum.
  • the UE configures the bottom layer and the upper layer according to the configuration information (RAB information and RB information) in the handover message.
  • FIG. 2 is a flowchart of a method for switching a voice service according to the first embodiment of the present invention. As shown in FIG.
  • the method may include the following steps (step S202 - step S214) ):
  • Step S204 the UE takes out the new information in the message, checks it, checks whether its validity is legal, saves the resources if it is legal, and saves the RAB number information to be replaced in the RABreplace related to the SRVCC in the RAB to be deleted.
  • step S206 is performed.
  • Step S206 the TD access layer of the UE sends an SRVCC start message to the non-access stratum, and step S208 is performed.
  • Step S208 The non-access stratum mobility management module of the UE receives the SRVCC start message, and the MM calculates a new authentication parameter to wait for the SRVCC end message by using the Nonce parameter, and performs step S210.
  • Step S212 the UE sends an RB establishment complete message to the TD network.
  • the access layer of the UE sends an SRVCC complete message to the non-access stratum, and step S214 is performed.
  • Step S214 If the TD of the UE receives the SRVCC end message, if successful, the mobility management module MM module of the UE establishes a mobility management connection, and notifies the CS voice module to establish a voice entity, and notifies the SM/ESM to delete the voice bearer, and the CS voice service is successfully established.
  • the switching of the voice service from the TD network supporting the PS domain to the TD network supporting the CS domain is implemented, and the continuity of the voice service can be ensured.
  • Embodiment 2 In a case where the first network is an LTE network and the second network is a TD network, when the UE performs voice service switching, the access layer of the LTE network in the UE receives the handover message of the LTE network, and sends the handover message to the UE in the second network ( The access layer of the TD network forwards the handover message; the access layer of the second network in the UE saves the parameter information of the second network, and configures the bottom layer resource of the UE according to the saved parameter information of the second network, and switches the voice service to the first Two networks.
  • the UE may also perform an SRVCC process.
  • the access layer of the LTE network in the UE receives the handover message of the LTE network side
  • the access layer of the LTE in the UE sends an SRVCC start message to the non-access stratum of the UE, and the mobility of the non-access stratum in the UE
  • the management module (MM) calculates the authentication parameters.
  • the access layer of the second network in the UE configures the bottom layer resource of the UE according to the saved parameter information of the second network
  • the UE sends a handover complete message to the LTE network, and sends an SRVCC end message to the non-access stratum of the UE.
  • the UE camps on the cell of the LTE network and is processing the PS domain voice call.
  • the LTE network decides to switch the voice service of the UE to the TD network cell, and the TD network cell only supports the CS voice service, so The SRVCC process needs to be done to switch the PS voice call to a CS voice call on another TD cell.
  • the LTE network access layer of the UE receives the handover message, and the handover message includes the RAB information and the RB information that need to be newly created.
  • the LTE access layer of the UE sends the message to the access layer of the TD network in the UE, and sends an SRVCC start message to the non-access stratum of the UE.
  • the UE calculates the authentication. parameter.
  • the access layer of the TD network in the UE saves them to the new resource table, and configures the bottom layer with the information.
  • the LTE network access layer of the UE sends a handover complete message to the LTE, and then the LTE access layer of the UE sends a message that the SRVCC process ends to the TD non-access stratum of the UE.
  • the MM module establishes a message.
  • FIG. 3 is a flowchart of a method for switching a voice service according to the second embodiment of the present invention. As shown in FIG. 3, the method may include the following steps (step S302 - step S314) In the step S302, the access layer of the LTE network in the UE receives the handover message from the LTE network to the TD network, where the handover message carries RABreplace information (represented as an SRVCC procedure), and step S304 is performed.
  • step S302 the access layer of the LTE network in the UE receives the handover message from the LTE network to the TD network, where the handover message carries RABreplace information (represented as an SRVCC procedure), and step S304 is performed.
  • Step S304 The access layer of the LTE in the UE sends a handover message to the access layer of the TD network in the UE, and sends an SRVCC start message to the non-access stratum of the UE, and step S306 is performed.
  • Step S306 the non-access stratum mobility management module MM module in the UE receives the SRVCC start message, and the MM module calculates a new authentication parameter by using the Nonce parameter, and waits for the SRVCC end message.
  • Step S308 is performed.
  • Step S308 the access layer of the TD network in the UE saves the resource after receiving the handover message, and performs validity check. If the check passes, the bottom layer resource is configured by using the new resource, and step S310 is performed.
  • Step S310 after the handover is completed, the access layer of the LTE network in the UE sends a handover complete message to the LTE network side, and step S312 is performed.
  • Step S312 The access layer of the LTE network in the UE sends an SRVCC complete message to the non-access stratum of the UE, and step S314 is performed.
  • Step S314, the TD network receives the SRVCC end message in the UE.
  • the UE mobility management module MM establishes a mobility management connection, notifies the CS voice module to establish a voice entity, and notifies the session management/Advanced Session Management (Session Management/Enhanced Session).
  • SM/ESM Deletes the voice bearer and completes the CS voice establishment at the protocol stack level.
  • the switching of the voice service from the LTE network to the TD network is implemented, and the continuity of the voice service can be ensured.
  • the access layer of the TD network in the UE receives the handover message of the TD network, and sends the handover message to the non-access layer in the UE.
  • the non-access stratum mobility management module in the UE calculates the new SRVCC Nonce (single channel voice continuity Nonce encryption parameter) encryption parameter in the handover message sent by the TD network side.
  • the authentication parameter is saved in the memory, and the handover succeeds until the new GSM second network is used by the UE. If the handover fails, the new authentication parameter needs to be deleted; the TD access layer receives the handover message according to the handover message.
  • the content calculates the handover type, and sends a handover request to the GSM module of the UE; the GSM bottom layer performs the synchronization operation; after the synchronization is completed, the GSM module in the UE notifies the TD module that the handover is completed; the TD releases all the TD resources in the UE, and sends the SRVCC_End to the non-access layer.
  • the non-access stratum of the UE receives the SRVCC end message, if the handover succeeds, the MM establishes a mobility management connection, and notifies the CS voice module to establish a voice entity, and notifies the SM/ESM. In addition to the voice carrier; this time to complete the establishment of a CS voice.
  • FIG. 4 is a flowchart of a method for switching a voice service according to Embodiment 3 of the present invention. As shown in FIG. 4, the method may include the following steps (step S402 - step S414) ): Step S402: The UE is in the TD PS voice call, and the signal is degraded.
  • the TD network decides to cut to the GSM cell according to the current neighboring situation, and the GSM cell only supports CS voice.
  • the TD network access layer in the UE receives the message from the TD network side to the GSM, and indicates that it is the SRVCC process, and performs step S404.
  • Step S404 the UE sends an SRVCC start message to the non-access stratum, and step S406 is performed.
  • Step S406 The non-access stratum mobility management MM module in the UE receives the SRVCC start message, calculates a new authentication parameter by using the Nonce parameter, and waits for the SRVCC end message, and performs step S408.
  • Step S408 After receiving the handover message, the TD network access layer fills in the handover type (hotype), and uses the handover message received from the TD network side to request handover to the GSM, and the GSM performs the bottom synchronization operation, and step S410 is performed.
  • the determining process of the handover type as shown in FIG. 5, the process may include: after receiving the handover from the TD to the GSM message, the UE sets the CS handover type (Cstype) to 0, and the PS handover type (Pstype). Is 0.
  • step S410 the GSM network in the UE notifies the UE that the GSM network GSM underlay synchronization is completed, and the handover to GSM is successful, and step S412 is performed.
  • Step S412 The TD network in the UE releases the resources of the TD, and sends an SRVCC_End message to the non-access stratum of the UE, and step S414 is performed.
  • step S414 the non-access stratum of the UE receives the SRVCC end message. If the handover succeeds, the mobility management module MM in the UE establishes a mobility management connection, and notifies the CS voice module to establish a voice entity, and notifies the SM/ESM to delete the voice bearer.
  • the embodiment of the present invention implements the handover of the voice service from the TD network supporting the PS domain to the GSM network supporting the CS domain, and can ensure the continuity of the voice service.
  • the processing flow of the non-access stratum of the UE is basically the same, and the new authentication parameters are calculated differently.
  • the SRVCC Start (SRVCCJnd) message (indicating the start of the SRVCC process)
  • the SRVCC start message carries the original standard and target format, encrypts the information, and enables integrity protection. information.
  • the non-access stratum mobility management module MM first receives this message, and the MM establishes an MM connection and waits for the SRVCC end (SRVCC_End) message. After receiving the SRVCC_End message, if the SRVCC process is successful, the CS voice module is notified to establish a voice entity.
  • SRVCC_End SRVCC end
  • FIG. 8 is a structural block diagram of a switching apparatus for a voice service according to an embodiment of the present invention. As shown in FIG. 8, the apparatus may include: a receiving module 10 and a switching module 20. The receiving module 10 is configured to receive the first network.
  • the switching message is sent, where the first network is a network that supports a packet-switched (PS) domain voice service, and the handover message carries parameter information of a second network to which the voice service is to be switched, and the second network supports the circuit-switched CS domain.
  • the network of the voice service; the configuration module 20 is coupled to the receiving module 10, configured to perform resource configuration according to the parameter information of the second network, and switch the voice service to the second network.
  • the UE receives the handover message of the first network (the network supporting the voice service of the PS domain), and performs resource configuration according to the parameter information of the second network (the network supporting the voice service of the CS domain) carried in the handover message.
  • the voice service of the UE is switched to the second network, and the voice service is switched from the PS domain to the CS domain.
  • the UE currently performs voice service through a network that supports the PS domain voice service, and can switch to a network that supports the CS domain voice service when needed.
  • the UE may perform voice service switching within the same network. For example, the UE performs a PS domain-based voice service in the TD network, and the UE moves to an area that only supports the CS domain voice service.
  • the medium PS domain voice service is switched to the CS domain in the TD network.
  • the UE can also perform voice service switching between different networks.
  • the UE performs the PS domain voice service through the EPS network, detects that the EPS network signal quality is degraded, and the current TD network (supports the CS domain voice service) signal quality. Higher, the UE can switch the voice service from the EPS network to the TD network.
  • the following describes an example in which the voice service is switched from the PS domain of the TD network to the CS domain of the TD network, and the PS domain of the LTE network is switched to the CS domain of the TD network.
  • FIG. 9 is a structural block diagram of a switching apparatus for a voice service in a TD network according to an embodiment of the present invention. In the apparatus shown in FIG.
  • the receiving module 10 is further configured to be a TD network in the first network and the second network.
  • the configuration module 20 may include: a first saving unit 202, configured to save parameter information of the second network in an access layer of the first network of the UE.
  • the first configuration unit 204 is coupled to the first storage unit 202, and configured to configure the bottom layer resource of the UE according to the saved parameter information in the access layer of the first network of the UE, and switch the voice service to the second network.
  • FIG. 10 is a structural block diagram of a preferred configuration module according to an embodiment of the present invention. As shown in FIG.
  • the configuration module 20 may further include: a deleting unit 206, configured to delete parameter information of the first network.
  • the deleting module 206 may save the RAB information that needs to be deleted in the deletion list according to the RABreplace information.
  • the UE in order to maintain continuity of voice services, the UE may also perform a Single Channel Voice Continuity (SRVCC) procedure.
  • SRVCC Single Channel Voice Continuity
  • the access layer of the UE sends an SRVCC start message to the non-access stratum of the UE, where the UE is not o
  • the access layer calculates the authentication parameters.
  • the access layer of the UE sends an SRVCC end message to the non-access stratum of the UE.
  • 11 is a structural block diagram of a device for switching a voice service of an LTE network to a TD network according to an embodiment of the present invention.
  • the receiving module 10 includes: a receiving unit 102, configured to be The LTE network and the second network are in the case of the TD network, and receive the handover message of the LTE network.
  • the sending unit 104 is coupled to the receiving unit 102, and is configured to forward the handover message to the access layer of the second network in the UE.
  • the second saving unit 208 is configured to save the parameter information of the second network in the access layer of the second network in the UE.
  • the second configuration unit 210 is coupled to the second saving unit 208, and is configured to be the second in the UE.
  • the access layer of the network configures the underlying resources of the UE according to the saved parameter information of the second network, and switches the voice service to the second network.
  • the UE may also perform an SRVCC process. Specifically, after the access layer of the LTE network in the UE receives the handover message of the LTE network side, the access layer of the LTE in the UE sends an SRVCC start message to the non-access stratum of the UE, and the MM of the non-access stratum of the UE The module calculates the authentication parameters. After the access layer of the second network in the UE configures the bottom layer resource of the UE according to the saved parameter 5 information of the second network, the UE sends a handover complete message to the LTE network, and sends an SRVCC end message to the non-access stratum of the UE.
  • the UE receives the handover message of the first network (the network supporting the PS domain voice service), and follows the second network carried in the handover message (supports the CS domain)
  • the parameter information of the voice service network is configured to switch the voice service of the UE to the second network, and the voice service is switched from the PS domain to the CS domain.
  • the handover type determination method is proposed by switching from TD to GSM, so that the PS data service can be smoothly continued. Continue to the GSM network.

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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif de commutation de service téléphonique. Ledit procédé se déroule de la manière suivante : un équipement utilisateur (UE) reçoit un message de commutation qui est envoyé par un premier réseau, ce premier réseau étant un réseau qui prend en charge un service téléphonique d'un domaine de commutation de paquets (PS), le message de commutation contenant des informations de paramètres relatives au service téléphonique qui doit faire l'objet d'une commutation vers un second réseau, et le second réseau étant un réseau qui prend en charge un service téléphonique d'un domaine de commutation de circuits (CS) ; et, en fonction des informations de paramètres relatives au second réseau, ledit UE réalise une configuration de ressources et une commutation du service téléphonique vers le second réseau. La présente invention permet de réaliser la commutation du service téléphonique du domaine PS vers le service téléphonique du domaine CS.
PCT/CN2012/076447 2012-02-29 2012-06-04 Procédé et dispositif de commutation de service téléphonique WO2013127136A1 (fr)

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WO2018065936A1 (fr) * 2016-10-07 2018-04-12 Telefonaktiebolaget Lm Ericsson (Publ) Prise en charge de continuité d'appel radio vocal unique dans des réseaux de la prochaine génération (5g)

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EP3524008B1 (fr) * 2016-10-07 2022-05-04 Telefonaktiebolaget LM Ericsson (publ) Prise en charge de continuité d'appel radio vocal unique dans des réseaux de la prochaine génération (5g)

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